Chess board



FIG. 1 is a perspective view showing our new design for a chess board,

FIG. 2 is a plan view thereof,

FIG. 3 is a bottom view thereof,

FIG. 4 is a front side view thereof, the rear view being a mirror image, and,

FIG. 5 is a left side view, the right side being a mirror image. 

The ornamental design for a chess board, as shown and described. 